Compilare: user.c: In function 'update_sourceDist': user.c:155: warning: unused variable 'a2' user.c:155: warning: unused variable 'a1' user.c: In function 'dijkstra': user.c:175: warning: unused variable 'h' user.c: In function 'main': user.c:276: warning: format '%d' expects type 'int', but argument 3 has type 'long int' user.c:287: warning: control reaches end of non-void function user.c: In function 'minim': user.c:141: warning: 'index' may be used uninitialized in this function